Re: control on minuit2

Hello,

  you can check the status from the FunctionMinimum class, (see http://project-mathlibs.web.cern.ch/project-mathlibs/sw/Minuit2/html/classROOT_1_1Minuit2_1_1FunctionMinimum.html)

There are methods like FunctionMiminum::HasReachedCallLimit() or FunctionMinimum::IsAboveMaxEdm() which tell you the reason. If you use Minuit2 via the Minuit2Minimizer class, you have this printed automatically when you set a verbose mode (print level >0)

  Best Regards

  Lorenzo
On Oct 26, 2008, at 7:46 PM, Patrick Dupre wrote:

> Hello,
>
> Many many times I get a IsValid wrong even by letting ine parameter
> free. How, can I get more control on the fit convergence ?
> For example, when it did not converge, how can I know the reasons ?
> number of iterrations, low convergence, etc ... ?
>
> thank
>
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> Patrick DUPRÉ | |
> Department of Chemistry | | Phone: (44)-
> (0)-1904-434384
> The University of York | | Fax: (44)-
> (0)-1904-432516
> Heslington | |
> York YO10 5DD United Kingdom | | email: pd520_at_york.ac.uk
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Received on Mon Oct 27 2008 - 09:51:16 CET